BBC News: Providing information that policymakers can use is key to the Intergovernmental Panel on Climate Change (IPCC) as work begins on its next global assessment. The report, known as AR5, will focus on factors that materially affect people’s lives, such as the Asian monsoon. It will also look at what aspects of climate change might be irreversible. Leaders of the IPCC’s scientific assessment were speaking to BBC News during a conference in South Korea aimed at modernising the …